Company lists · Data refreshed September 2026

Top 17 Overpass engineering companies based in Türkiye

RevenueBase identified 88 overpass engineering companies headquartered in Türkiye as of September 2026 and tracks 5,035 professional contacts across them, including 203 with verified work emails. Istanbul is the largest hub.

This list covers overpass engineering companies headquartered in Türkiye, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 29, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 29, 2026 86% judged on-target in blind review
88Companies
5,035Contacts tracked
203Verified emails
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The 17 largest overpass engineering companies based in Türkiye

Ranked by team size
Top 17 of 88 overpass engineering companies based in Türkiye, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to overpass engineering companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceTürkiyeHQ checked Sep 29, 202610001+2,852 contacts →

Indirect evidence

“Yapı Merkezi, founded in 1965, aims "to create and to realize construction projects that will serve humanity by creating environments of happiness".”

Source: RevenueBase Database · checked Sep 29, 2026
2Indirect evidenceIstanbul, TürkiyeHQ checked Sep 29, 20261,001-5,000673 contacts →

Indirect evidence

“Rightfully regarded as one of Turkey's leading contractor firms, Makyol is active in the areas of: • Heavy construction & infrastructure (highways, airports, dams, tunnels…”

Source: RevenueBase Database · checked Sep 29, 2026
3Indirect evidenceKucukcekmece, TürkiyeHQ checked Sep 29, 20261,001-5,000341 contacts →

Indirect evidence

“IRIS AS headquartered in Istanbul.”

Source: RevenueBase Database · checked Sep 29, 2026
4Partial evidenceAnkara, TürkiyeHQ checked Sep 29, 2026201-500164 contacts →

Partial evidence

“Founded in 1985, Prota Engineering is a pioneering design firm with a global footprint, having executed over projects spanning across 25 countries, having offices in Turkey…”

Source: RevenueBase Database · checked Sep 29, 2026
5Partial evidenceUmitkoy, TürkiyeHQ checked Sep 29, 2026201-500119 contacts →

Partial evidence

“MEGA Engineering Consulting Inc, established in 1993, is a multidisciplinary firm that provides engineering, design, construction supervision and project management services for a…”

Source: RevenueBase Database · checked Sep 29, 2026
6Partial evidenceÇankaya, TürkiyeHQ checked Sep 29, 202651-20044 contacts →

Partial evidence

“EFK Engineering is an engineering and design company established in 2004 in Ankara, Turkey.”

Source: RevenueBase Database · checked Sep 29, 2026
7Indirect evidenceÇankaya, TürkiyeHQ checked Sep 29, 202651-20029 contacts →

Indirect evidence

“With its experience from 1988, Kappa has been producing bridge and viaduct constructions and pre-tensioned bridge beams since Kappa has taken its place as the leading solution…”

Source: RevenueBase Database · checked Sep 29, 2026
8Indirect evidenceİstanbul, TürkiyeHQ checked Sep 29, 202651-20025 contacts →

Indirect evidence

“İnşaat sektöründeki 50 yıllık tecrübemizin arkasında, faaliyet süremiz boyunca devlet sektöründe iş yapmanın saygınlığı ve haklı gururu bulunmaktadır.”

Source: RevenueBase Database · checked Sep 29, 2026
9Partial evidenceİstanbul, TürkiyeHQ checked Sep 29, 202611-5017 contacts →

Partial evidence

“Modern Muhendislik was established in 2005 by Galip Topönder, who has 25 years of experience in Civil & Structural Engineering.”

Source: RevenueBase Database · checked Sep 29, 2026
10Indirect evidenceŞişli, TürkiyeHQ checked Sep 29, 202611-5010 contacts →

Indirect evidence

“1- Karayolu Ulaştırma Mühendisliği Hizmetleri: Otoyollar, çevre yolları, bağlantı yolları, cadde ve sokaklar, site içi yollar gibi çeşitli karayolu tesisleri ile ilgili her…”

Source: RevenueBase Database · checked Sep 29, 2026
11Partial evidenceAnkara, TürkiyeHQ checked Sep 29, 20261-108 contacts →

Partial evidence

“Trusted Source of Fast and Professional Answers for Bridge Engineering”

Source: RevenueBase Database · checked Sep 29, 2026
12Indirect evidenceIstanbul, TürkiyeHQ checked Sep 29, 202611-505 contacts →

Indirect evidence

“PROTEK PROJE ulaşım, trafik, altyapı, mimari tasarım, ve inşaat kontrollüğü danışmanlığında önde gelen şirketlerden biridir.”

Source: RevenueBase Database · checked Sep 29, 2026
13Partial evidenceIstanbul, TürkiyeHQ checked Sep 29, 20261-105 contacts →

Partial evidence

“STRUCTURAL CIVIL ENGINEERING AND CONSULTANCY Tasarım Teknik Consulting & Engineering Co.”

Source: RevenueBase Database · checked Sep 29, 2026
14Indirect evidenceÜsküdar, TürkiyeHQ checked Sep 29, 202651-2003 contacts →

Indirect evidence

“Perform Mühendislik & Müşavirlik”

Source: RevenueBase Database · checked Sep 29, 2026
15Partial evidenceİstanbul, TürkiyeHQ checked Sep 29, 202611-502 contacts →

Partial evidence

“DENGE was founded in and has grown to become one of Turkey’s leading engineering design & consultancy company, with delivering innovative construction projects design and…”

Source: RevenueBase Database · checked Sep 29, 2026
16Partial evidenceKadikoy, TürkiyeHQ checked Sep 29, 20261-102 contacts →

Partial evidence

“ACCORD is a specialist bridge and structural engineering consultancy delivering tailored solutions for complex infrastructure projects.”

Source: RevenueBase Database · checked Sep 29, 2026
17Indirect evidenceMerkez, TürkiyeHQ checked Sep 29, 2026201-5001 contacts →

Indirect evidence

“Ozisik Building and Energy which is an affiliate company of Isiklar Holding was founded in 1977 and has successfully completed many construction projects with full compliance with…”

Source: RevenueBase Database · checked Sep 29, 2026

Showing 17 of 88 overpass engineering companies based in Türkiye

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Overpass engineering companies based in Türkiye at a glance

As of Sep 29, 2026
4.0%Verified-email coverage
57.2Average contacts per company
11-50Median size (employees)
26.1%Largest-city concentration · Istanbul
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
31
11-50
20
51-200
17
201-500
6
501-1,000
7
1,001-5,000
5
10001+
1

Email recency for this list is measured worldwide rather than for Türkiye, so it is reported there. Company counts and contact totals on this page are exact for Türkiye, over 88 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among overpass engineering companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in Türkiye whose own description of what they do matches “overpass engineering companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names overpass engineering companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among overpass engineering companies, and records with no verified work email. Companies headquartered outside Türkiye are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every listed company carries at least one verified work email, 203 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 29, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names overpass engineering companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many overpass engineering companies are there based in Türkiye?

RevenueBase identified 88 overpass engineering companies headquartered in Türkiye as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Yapı Merkezi, headquartered in Türkiye, tops this list with the largest team on record.

Which city has the most overpass engineering companies?

Istanbul leads with 23 headquartered companies, followed by Ankara (19) and Cankaya (11).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 203 verified decision-maker contacts tracked across these 88 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.